Ventilating window screen or the like



United States Patent VENTILATING WINDOWSCREEN OR THE .LIKE

Richard Stwertka, New York, N.Y.

Application October 12, 1956, Serial No. 615,717

1 Claim. (Cl. 160-88) This invention relates to window screens and has for its objective .the provision of a-window screen construction which is capable of restoring the window area available for air penetration that is lost with the present type of window screen due to the area of solid wire mesh in the screen cloth used to prevent entry of insects, etc., and which is further capable .of utilizing thermal agitation for the additional release of room air into the outer air, as will hereinafter be shown.

This application is acontinuation-in-part of my copending application for Letters Patent upon an improvement in Ventilating Window Screen or the Like, which was filed in the United States Patent Ofiice on September 2, 1953, bearing Serial No. 378,053, now abandoned.

In the present state of the art the window screens, and for that matter door screens as well, now known and used are provided with a wire screen cloth over their entire surface area for the purpose of keeping insects from entering. In the usual type of screen cloth used, which has 16 meshes to the linear inch, or 256 meshes to the square inch, it has been calculated that approximately 24% of its screen area is solidly wire mesh, resulting in approximately 24% of said screen being impenetrable to air. In effect this reduces the amount of the normal window area available to air penetration.

One of the principal objects of my invention, therefore, is the provision of a window screen which will provide additional areas of air-entry to compensate for the area loss caused by the solidity of the wire mesh screen.

Another important object of my invention is to facili tate the passage of outer air into a room and the release of room air into the outer air.

A further important object of my invention is the provision of a structure adapted to restore the window area available to air entry which is blocked in the ordinary screen by the wire meshes.

A fourth important object of my invention lies in the provision of a window screen construction to enforce the natural air conditioning of a room which would be impaired and impeded by the old fashioned type of window screen.

Still another important object of my invention lies in the simplicity and economy of construction, as well as its adaptability.

Still other important objects, advantages and functional features of my invention, together with the novel features of construction, combination and arrangement of parts, will more readily appear from an examination of the following description, taken with the accompanying drawings which shows a preferred embodiment of my invention, wherein:

Fig. 1 is a front view of my invention showing window screen positioned within a window;

Fig. 2 is an enlarged fragmentary perspective view taken in the direction of arrow 2 of Fig. 1;

Fig. 3 is a cross-sectional view, taken on line 3-3 of Fig. 2.

"ice

Similar reference characters designate similar parts throughout the different views.

Illustrative of the embodiment shown and described by Figs. 1, 2 and 3, my invention comprises a window screen frame construction 10 comprising an innerframe 11 and an outer frame 12 secured to each other as will hereinafter be shown. The inner frame .11 is comprised of a bottom rail 13, a toprail 14 anda pair .of stiles 15 and 16, assembled with mitred corners and secured .to each other by suitable means .to form a four-sided frame.

A plurality of rectangular spacing strips 17 of precalculated depth are arranged vertically upon the .front face of the bottom rail 13 and the front face of the top rail 14, parallel to and equidistant from each other, as shown, and permanently secured to the faces thereof .by usual means, creating between them a plurality of channels 18.

A plurality of parallelopiped spacing strips 19 of the same pre-calculated -depth are arranged upon the .faces of the stiles .15 and ,16, .parallel to and .equidistantfrom each other as .shown, :and permanently .secured to .the faces thereof in fixed position by usual means, defining between them aplurality of .channels 20.

The corners of the inner .frame :11 are provided with blocks 21 and 22 having the same depth as the strips 17 and 19, to which the outer frame 12 is secured to the inner frame 11 by means of screws 23. The inner frame 11 is further provided around its perimeter with a flange 24 projecting at right angles thereto to a height substantially twice the depth of the strips 17 and 19.

A strip of wire screen cloth 25, having a width equal to the depth of the strips 17 and 19, is uninterruptedly wound around the edges of the strips 17 and 18 in zigzag fashion so as to define a complete enclosure of the opening defined by the inner frame 11, in height equivalent to the depth of the strips 17 and 19, the screen cloth 25 being secured to the edges of the strips 17 and 19 and of the blocks 21 and 22. The combination of screen cloth 25 and the strips 17 thereby divides channels 18 diagonally into upper channels 26 and lower channels 27, and the combination of the screen cloth 25 and the strips 19 thereby divides channels 20 into upper channels 28 and lower channels 29.

The outer frame 12 is composed of rails 30 and stiles 31, assembled with mitred corners and secured together in the fashion as inner frame 11, the rails 30 and stiles 31 being shorter in length than those of inner frame 11 to define a smaller frame which, When secured to the inner frame 11, is adapted to define between the frames an air gutter 32 between the outer edge of the outer frame 12 and the inner edge of the inner frame flange 24, as shown.

The outer frame '12 is provided with a recess 33 around its inner edge. A shielding wire screen 34 is provided upon the frame 12 to cover the opening defined thereby, the edges of the wire screen 34 fitting into the recess 33 and secured therein by means of a molding 35 fitting into the recess 33 and secured thereto and to the frame 12 by brads or other suitable means.

The outer frame 12 is secured to the inner frame 11 by means of the screws 23 as described, so that the back of the frame 12 fits tightly against the upper surfaces of the strips 17 and 19, defining between them the channels 18 and 20, leading from the inside or back of the combined frames to the front or outer air through the air gutter 32, the air passageway thereby defined being guarded against the entry of insects therethrongh by means of the barrier screen strip 25.

The parts of construction of my invention may be of wood, metal, composition, plastic or any other material, or any combination of the same, which are practical and suitable for the purposes indicated. The frames and strips shown in the embodiment hereinabove described are of wood for purposes of illustration.

The operative use of my invention the embodiment shown by Figs. 1-3, is assembled as shown and described, and placed within the window frame. The plurality of air carrying channels 18 and 20 form additional air openings, supplementary to the air openings in the wire meshes of the shielding wire screen 34, thus compensating for the loss of air-area necessitated by the solidity of the wire meshes of the screen 34 blocking air communication through the faces of the frame.

Assuming that the total sum of cross-sectional areas in the plurality of air carrying channels 18 and 20 has been made at least equal to the air-penetration loss caused by the solidity of the wire meshes of the screen'34, this loss is completely compensated for as though the wire mesh screen 25 provided no resistance whatever to air communication between the room air and the outer air. The effect of venting is created with the plurality of air carrying channels 18 and 20 and will facilitate an exchange of room air with outer air.

It is to be understood that although all references hereinafter have been made to window screens it is to be clearly understood that the invention as well applies to door screens and other forms of air entries.

The embodiment shown and described is byway of illustration only, and various changes may be made in the construction and arrangement of parts, as well as Y Y 4 substitution of equivalents, without limitation upon or departure from the spirit and scope of the invention, or sacrificing any of the advantages thereof inherent therein, and the illustrations are not intended as limitations.

Having described my invention, I claim:

A screen construction comprising in combination an inner frame and an outer frame secured together in spaced apart relationship, said outer frame comprising frame members of L-shaped cross section, one of the legs of each said L-shape member being in the plane of said frame and the other of said legs being perpendicular thereto, said inner frame comprising members each positioned in the space defined by said legs of one of said outer frame members and being spaced from said legs, a plurality of spacer blocks positioned between said first leg of said outer frame members and said inner frame members, said spacers being mounted in parallel relationship with respect to each other along the inner surface of said first leg, a screen positioned in the inner frame, and second screen means secured between said inner and outer frames and woven between the spacer blocks.

Wright Apr. 21, 1903 Pitcher May 18, 1915 

